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Aero Precision M4E1 Threaded 16" 5.56 Mid-Length Complete Upper Receiver with ATLAS R-ONE Handguard, Adjustable Gas
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Aero Precision M4E1 Enhanced 16" 5.56 Mid-Length Complete Upper Receiver with 15" Enhanced M-LOK Handguard, Ad
Aero Precision M4E1 Enhanced 14.5" 5.56 Mid-Length Complete Upper Receiver with 12" Quad Rail Handguard - Anod
Aero Precision M4E1 Threaded 7.5" 5.56 Complete Upper Receiver with 7" M-LOK ATLAS R-ONE Handguard - FDE Cerak
Aero Precision M4E1 Threaded 7.5" 5.56 Complete Upper Receiver with 7" M-LOK ATLAS R-ONE Handguard - Anodized
Aero Precision M4E1 Threaded 16" 5.56 Mid-Length Complete Upper Receiver with ATLAS R-ONE Handguard - Magpul OD Cer
Aero Precision M4E1 Threaded 16" 5.56 Mid-Length Complete Upper Receiver with 15" ATLAS S-ONE Handguard - Magp
Aero Precision M4E1 Enhanced 10.5" 5.56 Complete Upper Receiver with Pinned FSB and 7" Quad Rail Handguard - A
Aero Precision M4E1 Threaded 10.5" 5.56 No Forward Assist Complete Upper Receiver with 9.2" M-LOK ATLAS S-ONE
Aero Precision AR15 Complete Upper with No Forward Assist, 11.5" 5.56 Barrel, 9" M-LOK ATLAS S-ONE Handguard -
Aero Precision M4E1 Threaded 11.5" 5.56 Barrel Complete Upper Receiver with 10.3" M-LOK ATLAS R-ONE Handguard